Hydraulic pressure booster motor



Dec. 23, 1958 C, M, TURSKY 2,865,294

HYDRAULIC PRESSURE BOOSTER MOTOR Filed March 12, 1957 2 Sheets-Sheet l L 1 l I l l 3o' X Y 20 l --53 35 l j n l l v M /y 7 i l Il /5 IL E.

58 INVENTOR. 27 CHARLES /Vl 7/R5Ky H TTOENEY Dec. 23, 1958 i c. M. TURSKY 2,865,294

HYDRAULIC PRESSURE BOOSTER MOTOR Filed March 12, 1957 2 Sheets-Sheet 2 INVENTOR. CHA/9.1.55 M Ens/Y HTTORNEY United States Patent O HYDRAULIC PRESSURE BOOSTER MOTQR Charles M. Tnrsky, Palisades Park, N. J. Application March 12, 1957, serial No. 645,425

1S Claims. (Cl. 10S-57) This invention relates to a hydraulic pressure booster motor, wherein the casing structure of the motor comprises a center rotor casing and a pair of similar side cylinder casings having angularly disposed pairs of cylinders arranged therein with crank means coupled with the rotor in said rotor casing for transmitting reciprocating,` as well as rotary, oscillating movement to pairs of pistons operating in the cylinder pairs in controlling intake and discharge of the hydraulic pressure medium with respect to said cylinders.

Still more particularly, `the invention deals with a motor of the character described, wherein the pairs of pistons have circumferentially spaced ports extending longitudinally of the outer end portions of the pistons and intermittently registering with circumferentially spaced ports of cylinder liners in control of transmission of the hydraulic medium to the cylinders and high pressure discharge of the medium through the head ends of said cylinders. i

The novel features of the inventionwill be best understood from the following description, when taken together with the accompanying drawing, in which certain embodiments of the invention are disclosed and, in which, the separate parts are designated by suitable reference characters in each of the views and, in which:

'Fig 1 is an irregular broken vertical section through a motor made according to my invention, showing parts of the construction in elevation and omitting parts for simplication in the showing.

Fig. 2 is a partial section on the line 2-2 of Fig. `1.

Fig. 3 is a partial section on the line 3 3` of Fig. 1, with parts of the construction broken away and parts shown in elevation; and

Fig. lis a partial section on the line 4,-4 of Fig. 3.

Considering Fig. `1 of the drawing, it will appear that my improved motor comprises a` central rotor casing arranged upon suitable feet or supporting bases, one of which is indicated, in part, at 11.. Secured to opposed sides of the rotor casing 1G are a pair` of similar cylinder casings 12, 12.', these casings being secured by a plurality of circurnierentially spaced bolts, indicated, in part, at 13.

The cylinder casingvlz` alone will bedescribed in detail and is shown, in part, in Fig. 3 and, as and where portions ofthe companion cylinder casing 12* are shown in Fig. Vl, primed Areferences will be applied.

The casings 12, 12' include inner adjacent wallV portions 14, 1d', which rit snugly upon opposed sides ofa rotor 15 mounted in the rotor casing lll. The rotor `15 has an extended hub portion 16 with rollen bearing mountings, as at 17, 17", in the walls 14, 14', as diagrammatically illustrated in Fig. 1 of the drawing. lt will also appear that the walls 14, 14 have portions 18,18

which fit snugly upon opposed sides of the rotor casing 10, thus completely housing the rotor 12between the casings 10, 12, 12', particularly at the outer peripheral portion thereof. l

` Theouter walls of the casings 12, 12' are outwardly Mice 12 has opposed cylinders'22, 23 arranged at substantially 45 to the horizontal and it will be understood that the companion cylinder 12 has a similar arrangement of cylinders which are arranged at to the cylinders 22, 23. Arranged in the cylinders 22, 23 are similar liners 24, the liners 24 being indicated, in part, .diagrammatically in Fig. 1. These liners have reduced inner ends 2S forming shoulders, as at 26, seating in the cylinders 22, 23 and suitable means, not shown, is provided for definitely keying the liners against rotation in the respective cylinders. The liners 24 have circumferentially spaced intake ports 27, which open into annular grooves 28 in they periphery of the liners, the grooves 2S registering with ports 2Q in the cylinders 22, Z3, one of these ports being shown, for example, in Fig. 4 in the 'cylinder 22, it being understood, in this connection, that the cylinder 23 has a por-t similar to the port 29.

VMounted in and operating in the liners 24, 24 are piston units 3), 3G', each having a pair of opposed pistons 31, 31 operating in the liners 24, 24'. The piston units 30, 3Q have, centrallythereolf, hub portions 32, 32, in which are mounted crank pins 33, 33', the pins having inner ball ends 34, 34' having bearing supports in the hub portion 16 of the rotor 1S, the ball ends being retained in position in the hub portion by a removable bearing plate 35. This plate, as well as the opposed side of the bearing 16, is apertured, as seen at 36 in Figure l, to provide clearance for the swinging movement of the crank pins 33, 33', as will be apparent. The plate 35 is held in position by screws, as indicated at 37 in Fig. 2,

The pistons 31 have c ircumferentially spaced grooves 38 extending longitudinally `of the outer end portions thereof and opening through the head ends of the pistons to register with the cylinder ends 39 of the liners 24.

-lt will appear from a consideration of Fig. 2 that the crank pins 3,3, 33 are offset in opposite directions with respect to the axis of rotation of therotor 15, so that,

when the upper piston 31 is in its lower position, the correthen companion cylinders illustrated at the leftof Fig. l

of the drawing.

The heads 4-1 include reduced portions 42 fitting snugly in the cylinders 39 and sealing said ends ofthe cylinders, gaskets 43 being preferably employed to seal the heads on the llanges 4d. The fastening bolts for the heads are not shown in Fig. 3, but the apertures for reception of said bolts are diagrammatically illustrated at. 44 in` Fig. l.

The heads 41 have discharge ports 45 normally closed by spring-pressed ballv Valves 46 mounted in a large diameter bore 47, having circumferentially spaced ribs 48 to centralize the ball valves 46 therein.V Coupled with the outer ends of the head is an exhaust or discharge pipe 49, which communicates with the bore 47, as will be ap-V parent. VIt will be understood, in this connection, that, in the pressure discharge of the hydraulic medium vfrom the cylinders 39, the ball valves 46 are readily unseated and these check valves are used simply to insure seating Patented Dee. 23, 1958 aseaesa plugged, as seen at 52, to a discharge port 53 arranged directly above the port 51 and, between these two positions, the rotor tits snugly on the surface 54 so that the pressure medium is sealed from passage from the port 53 to communication of the port 51 with the annular passage50. e

The rotor 15 is shown partially in sectional detail in Fig. 2 of the drawing. The rotor has a multiplicity of circumferentially spaced pockets 55 in the periphery thereof, the pockets having, at one side thereof, flared portions 56 for extending admission of the charge of the pressure medium into the pockets from the port 51, as will be apparent in rotation of the rotor 15 in a clockwise direction, as noted in Fig. 2. It will appear from this figure of the drawing that alternate pockets 55 have discharge ports 57 opening through one side surface of the rotor; whereas, the intermediate pockets will have similar ports -opening through the opposed side surface of the rotor. Thus, as the rotor is driven by the predetermined pressure of a hydraulic medium introduced into the port 51, this medium, under such pressure, passes into the passage 50 and the respective pockets 55 and is discharged into the annular grooves 28 of the respective liners 24 through the ports 29, note Fig. 4, as and when the ports 57 register with said ports 29.

Considering Fig. 4 of the drawing, it will be apparent that, when the pistons 31 are in the pressure discharge position for high pressure discharge of the pressure medium from the cylinders 39, in other words, the position of the lower piston 31 in Fig. 1, the ports or passages 38 will be in non-registering position with the ports or passages 27. However, in the cycle of operation of the motor, as this piston is moved inwardly by rotation of the crank 33, the piston 31 -is rotated, bringing the ports 38 in registering position with the ports 27, thus timely admitting the pressure medium into the cylinder 39 and the completion of this intake stroke is noted by the upper piston 31 in Fig. 3, it being understood that, at the completion of this inward stroke of the upper piston 31, the ports 27, 38 will come to a closed position, similar to that illustrated in Fig. 4 and, during the upward or compression stroke of the upper piston 31 `and until such piston reaches the limit of its upward stroke, these ports will remain closed with respect to each other; whereupon, at the beginning of the downward stroke of said upper piston, the ports will again open, thus timely admitting the pressure medium into the upper cylinder 39 until such time as such upper piston 31 reaches the bottom of its intake stroke, at which time the ports 27, 38 will again close and this cycle of operation continues in both cylinderunits in the operation lof the rotor.

From the foregoing, it will be apparent that the motor has what might be termed a three-motion operation, namely the continuous rotary motion in the drive of the rotor, the reciprocating motion contributed to the piston units and the rotary reciprocating motion contributed to the piston units by virtue of the crank arrangement employed. The crank pins 33, 33' assume the diiferent angular positions in their movement from the positions shown in Figs. 1 and 3 to the positions where the pin 33 is uppermost and the pin 33' is lowermost and, again, in movement of the pin 33 from its uppermost to its lower- 4 pressure through the heads 41 for service use of any type or kind and a booster motor of the type and kind under consideration can be utilized in many elds, particularly Where increase of pressure of the hydraulic medium is desired.

It will be understood that the rotor diameter is large as compared with the stroke of the pistons of the piston units and, in the same sense, it will appear that the volume of the pressure medium in the rotor and rotor casing is greater than the capacity of the cylinders. These factors insure eicient operation of the motor at all times.

In the use of booster motors of the type and kind under consideration, the booster pressure discharge from the respective cylinders will be directed to a storage tank i and, as and when the pressure in the storage tank reaches most position,these positions being described with respect to the longitudinal axis of the cylinder liners. It is by virtue of this rocking or angular movement of the pins 33, 33 that the clearance openings 36 are provided.

It will be understood that a hydraulic medium introduced into the motor for operation of the rotor at one pressureV canl be discharged from the motor at a higher as they register with the ports 29.

a predetermined pressure, the booster motor will automatically stop and will remain idle until such time as the pressure in the storage tank drops to a point requiring re-charge by the booster motor.

By utilizing the liners in the cylinders, these liners can be initially adjusted for positioning of the liner ports with respect to the piston ports in attaining the most etlicient operation of the motor. When this has been attained, the liners are then deiinitely retained or keyed in the adjusted position. it is also desirable to point out, at this time, that the bores of the liners, as well as the surfaces of the pistons, are highly finished so that the pistons will operate in the liners with close tolerances, thus dispensing with the use of conventional piston rings.

It will be apparent that the piston units, operating in .the opposed cylinders and in combination with the ports of said cylinders in their rotary reciprocating motion, act as a valve stage in the control of the transmission of the pressure medium from the rotary stage to the cylinder stage, which charge is intermittent through the ports 57 In this operation, it will be understood that the cylinders are charged with the pressure of the medium as discharged from the rotor through said ports into the respective cylinders. ln the aforesaid operation, it will be apparent that the introduction of the pressure medium into the cylinder results in the action of this pressure upon the piston in assisting 'in the drive of the piston unit during the booster pressure discharge of the opposed piston of said unit. Considering, in this connection, Fig. 3 of the drawing, it will be apparent that the pressure medium introduced into the vdischarge through the heady of said lower cylinder.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A booster motor of the character described, comprising a rotor casing, a pair of similar cylinder casings xed to and bearing upon opposed sides of the rotor casing, a multiple pocket rotor rotatably mounted in the rotor casing and having bearing engagement with adjacent surfaces of the cylinder casings, the rotor having a hub portion, a pair of oppositely directed crank pins having ball mountings in the hub of said rotor at equally spaced opposed positions with respect to the axis of said rotor, each cylinder casing having spaced cylinders with cylinder liners therein, the cylinders of one casing being adapted to register with ports of alternate pockets of said rotor, cylinder heads at outer ends of said cylinders, said cylinder heads having check valve controlled discharge ports, the liners of said cylinders having annular grooves in registering alinement with the circumferentiala ly spaced ports on adjacent walls of said cylinder casings, said pistons having circumferentially spaced longitudinally extending grooves at outer end portions thereof opening into the ends of the cylinders, and said liners having circumferentially spaced ports registering with the annuiar grooves of said liners and with the grooves of pistons at predetermined intervals in the cycle of operation of the rotor for admitting the pressure medium into the cylinder ends, preparatory to pressure discharge ot the medium from said cylinders through the exhaust ports of said heads.

2. A structure as defined in claim l, wherein the hub portion of the rotor includes a removable bearing plate, and said bearing plate and hub portion being apertured to compensate for rotary and angular movement of 'the crankpins.

3. A structure as defined in claim 2, wherein anti- `friction bearings are disposed between the hub portion of the rotor and the walls of the cylinder casings.

4. A structure as defined in claim 3, wherein the cylinder casings have large openings centrally of outer sides thereof and closure plates for said openings.

5. A structure as defined in Claim 1, wherein the pockets of the rotor include iiared outer portions directed toward the intake port of the rotor casing.

6. A structure as defined in claim 5, wherein the outer ends of the cylinders of each cylinder casing are flanged for mounting of the heads thereon, and said heads include portions extending into the cylinders and abutting the cylinder liners.

7. A structure as deiined in claim 6, wherein the cylinder casings include circumferentially spaced reinforcing ribs intermediate the cylinders of said casings.

8. In a booster motor of the character described, employing a central rotor having circumferentially spaced pockets, with means for injecting a pressure medium into the pockets in rotation of said rotor, a pair of piston units at opposed sides of the rotor, each unit comprising a pair o pistons operating in opposed cylinders, means in operative engagement with the rotor for reciprocating and rotary oscillating the piston units in control of admission of the pressure medium from the rotor pockets to the head end portions of the cylinders, in which said units operate and in pressure discharge of said pressure medium through head ends of said cylinders, and one group oi pockets directing the pressure medium to one piston unit and the other group directing the pressure medium to the other piston unit.

9. A structure as defined in claim 8, wherein one piston unit and its opposed cylinders are at right angles to the 5 other piston unit and its cylinders.

10. A structure as defined in claim 9, wherein the rotor operates in a rotor casing, the rotor casing having an intake port for introduction of the pressure medium, an exhaust port for the pressure medium, and the rotor casing, intermediate said intake and exhaust ports, having a circumferentially extending groove communicating with the pockets of the rotor.

11. A structure as defined in claim 10, wherein the pistons of each unit operate in liners fixed in the opposed cylinders for each unit.

12. A structure as defined in claim 11, wherein the pistons of each unit and the liners, in which the pistons operate, having intermittently registering ports timely controlling admission of the pressure medium to head end portions of the cylinders.

13. A structure as defined in claim 8, wherein said second named means comprises crank pins having universal mountings in the hub portion of said rotor and a slidable and rotatable mounting in each of the piston units.

14. A booster motor of the character described, comprising a iluid pressure driven rotor, two pairs of piston units, means movably supported in the rotor and operatively engaging said unit for imparting reciprocating and rotary oscillating motions to said piston units in the drive of said rotor, opposed cylinders in which the pistons of said units operate, the cylinders of one unit being positioned at right angles to the cylinders of the opposed unit, and means for timely introducfng the pressure liuid driving said rotor into the head ends of pistons of said units for booster pressure discharge of the medium from head end portions of the cylinders of said units in the cycles of operation of the motor.

l5. A structure as defined in claim 14, wherein the rotor includes a hub portion the cylinders of said piston units constitute part of cylinder casings sealed upon opposed sides of said rotor, and anti-friction bearings between the hub portion of the rotor and said cylinder casings.

16. A structure as defined in claim 14, wherein said rst named means comprises crank pins having universal bearings in the hub portion of said rotor.

17. A structure as defined in claim 14, wherein the piston units are disposed at opposite sides of the rotor, and said ro-tor having independent discharges of the fluid pressure at said sides for directing the same to the respective piston units and to said second named means.

18. A structure as defined in claim 17, wherein the cylinders include heads, and said heads having check valves controlling discharge of the boostered pressure medium through said heads.

References Cited in the le of this patent UNITED STATES PATENTS 516,840 Robinson Mar. 20, 1894 792,505 Dolling et al June 13, 1905 850,078 Vineyard Apr. 9, 1907 

